(b)(4).Visual examination of the returned patella reamer blade revealed scuff marks and gouges on the blade.The 1.4290 product identifier dimension was measured and confirmed to be within tolerance.The device was used for treatment a complaint search based on the product and lot combination did not reveal any related complaints.The root cause cannot be determined.This mdr was identified during an internal retrospective review to meet reporting requirements and therefore is being filed retrospectively.
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